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1. Chemical synthesis of polymers
The various polyethylene terephthalates are polymers obtained by polycondensation of one or two diacids with one or two diols, according to the following reaction scheme:
It's a balanced reaction: to produce polyester, you need to move in direction (1) with the elimination of water. However, if the polyester is brought to the molten state in the presence of water, the equilibrium shifts in direction (2). Water causes macromolecular chains to break up, leading, among other things,...
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Chemical synthesis of polymers
References
Standardization
American Society for Testing and Materials (ASTM)
- Standard Test Method for Water Absorption of Plastics. - ASTM D 570-98 -
- Standard Test Method for Haze and Luminous. - ASTM D 1003-00 -
- Standard Test Methods for Impact Resistance of Plastic. - ASTM D 1709-04 -
- Standard Test Method for transparency of Plastic Sheeting. - ASTM D 1746-97 -
- Standard Test Method for Specular Gloss...
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The Ultimate Scientific and Technical Reference